Question 1 What impact did the purchase of the Louisiana Territory have on the United States?
А A
It weakened the American borders.
B
It resolved the issue of slavery between the North and the South,
С
It expanded presidential power.
D
It strengthened American relationships with the Indian tribes

Using mr smith and his id, identify two potential internal validity threats that might affect the a—b design. tell me how that threat might impact conclusions in the a—b design. note #1: you cannot use maturation (since i already did that one for note #2: there are some mr smith id threats that won’t have much impact in a single case design.